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F FAMILY — ENVIRONMENTAL <br /> Storm Water Treatment Devices <br /> Environmental Concerns <br /> Discharge of the following materials into the stone <br /> water drainage system or watercourse: <br /> • Fuel • Sediment <br /> • Non-storm water • Trash <br /> • Oil • Vehicle fluids <br /> a <br /> DEFINITION AND Storm water treatment devices are measures or structures installed <br /> PURPOSE primarily to reduce storm water pollutants and improve water quality. The <br /> devices include vegetated treatment systems, infiltration basins and <br /> detention devices. <br /> APPROPRIATE Storm water treatment devices are planned, designed and installed through <br /> APPLICATION the Caltrans new construction, major reconstruction and retrofit project <br /> delivery process where a storm drain system discharges directly or <br /> indirectly to surface water. The devices are maintained in accordance with <br /> the procedures specified in the Storm Water Quality Practice Guidelines. <br /> OPERATIONAL • Limit the entrance/exit points to the activity site and stabilized against <br /> PROCEDURES erosion. <br /> • Avoid stockpiling contaminated soil or sediment and dispose of <br /> properly. <br /> • If clean sediment cannot be recycled, transport the material back to the <br /> Maintenance facility or an approved storage site. <br /> • Remove gravel and sediment from tires before reentering the highway. <br /> • See operation and maintenance procedures in Vegetated Treatment <br /> Systems (Biofiltration Swales and Strips)BMP. <br /> • See operation and maintenance procedures in Detention Device BMP. <br /> • See operation and maintenance procedures in Infiltration Basins BMP. <br /> 1 <br /> Caltrans Stom Water Quality Handbook B-48 <br /> Maintenance Staff Guide <br /> May 2003 <br />